Valve



.G. A. u ER l i 2,381,287

VALVE Filed July 18, 1939 All;

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Patented Aug. 7, 1945 VALVE .George A. ller, Riverside, Ill., assignor, by mesnc assignments, to General Finance Corporation, l Chicago, Ill., a corporation of Michigan Application July'ls, 1939, serial No. 285,122 Claims. (ci. 251-119) I'Ihis invention relates lto improvements in valves and has for its object to provide a new andimproved .device of thisdescription.

' The invention has as a further object to provide a valve which also acts as a check valve. The invention has as a further object to provide adiaphragm valve which inaddition to acting as a valvethrough which iluids flow, acts also as a check valve for'cutting off the flow of the tljd.A

The invention has further objects which are more particularly pointed out in the accompanying description.

`Referring now to thedrawing, Fig. 1 is a view showing onel form of valve embodying the invention;

Fig. 2 is is muguudinal section .through the Fig.,3 is a cross section through the valve.

v #Likenumerals refer to like parts throughout The drawing shows one form of valve embodying the invention. In the construction as shown in the drawing, the-l valve" comprises a casing l having a passageway therethrough with ian inlet 2 and an outlet 3. Extending across the passageway intermediate itsends is a wall I Awhich acts as the valve seat. The passageway has a portion 2a on one side of this wall and another portion 3a on the" other side of this wall. The casing is provided with an opening 5 opposite this wall.

There isla covert for the easing which extends over the opening 5 and which has a iluid receiving chamber 6a. A flexible diaphragm 1 extends over the opening 5, and the casing and diaphragm are fastened in position in any desired manner. As herein shown, the casing is provided with a flange l and the edge of the diaphragm is between y this flange and the lportion of vthe casing surrounding the opening 5. The'top of the wall 'I acts as the seat for the diaphragm andv when the diaphragm is movedinto contact with thisseat,l

When the parts are -assembled and the fluid enters the inlet 2, the diaphragm 1 is moved away from its seat so as to open up the passageway and the fluid passes through the passageway to the point desired. A portion of the iluid passing through the passageway passes through the opening I0 into the fluid receiving chamber 6a above the diaphragm 1. The pressure of the iuid in the portionv 2a of the passageway is greater than the pressure of the fluid in the portion 3a of the passageway under normal conditions, as the fluid ows through the casing from the inlet 2 to the outlet 3. Under these conditions, the pressure in the portion 2a of the passageway below the diaphragm is greater than the pressure in the iluid receiving chamber 6a above the diaphragm and the diaphragm is held open. fluid starts to flow in a reverse direction through the casing, that is, from the outlet 3 toward the linlet 2, the pressure in the portion 3a of the passageway becomes greater than that in the portion 2a on the other side of the wall, and this, due to i vthe openings. l0, causes the pressure above the engage its seat and close oi the reverse ow the valve is closed. and when the diaphragm moves away from the seat-.the valve is'operiecl.v

The cover and the diaphragm are held in position by the fastening devices 9 which extend througnthe nangel, the diaphragm vl and the casing l. The diaphragm is provided with fone or more openings I0. These openings are preferably providedV with a'metal lining Il. The casing I is preferably provided'with the flanges i2 and I3 bymeans of -which the casing is .connected in a suitable pipe line.v i 1 The use and operation of my Vinvention are as follows. w

diaphragm 1 in the fluid receiving chamber 6a 'to become greater than the pressure below the diaphragm and causes the diaphragm to move to through thel casing I. If the 'conditions cause the fluid to mlove into the inlet 2 to direct the iiow through the casing in the normal way, the pressure lifts the diaphragm 1 from its seat, so

that the fluid can iiowthrough the casing and be forced out. l

It will be seen that this construction produces a valve which isy exceedingly sensitive and which acts quickly to shut off'anyl reverse iiow through the valve and to quickly .open up and' permit the normal forward ilow of the iluid through the valve. y A l Y It will further .be seen that there is' here provided a valve having a casing having a passageway ,therethrough with van inlet'and" an outlet,

. Athere being an opening intermediate the 'inlet and outlet, with a diaphragm extending thereacross..a seat for the diaphragm intermediate v the lretI and outlet, a fluid receiving chamber, the diaphragm being between the iluld receiv-'i ing chamber and the seat, and a fluid connection the nuid receiving-chamber.

vI claim:

leading from a pointdownstream of theseat to 1. An automatic .valve-'comprising a vcasing having a substantially -continuous passageway extendin'gCin a generally continuous forward direction therethrough with an inlet and an outlet.

If now the' an obstructing wall extending across said passageway between the inlet and the outlet, said casing having an opening above said wall, a flexible diaphragm extending across said opening.

which engages said wall to close the passage' way, a cover for said opening having -a fluid receiving chamber above said diaphragm, said wall dividing said passageway into two sections below said diaphragm, an upstream section and a downstream section, and acting to increase the pressure in said upstream section anddecrease the pressure in said downstream section when the fluid is flowing normally through the casing, and a passage through the diaphragm providing communication between the fluid receiving chamber above said diaphragm and the section of the passageway downstream of said wall, through which fluid passes into said fluid receiving chamber, the pressure in said downstream section being increased and the pressure in said upstream section being decreased when the fluid starts to iiow in a reverse direction through the casing, so as to increase the pressure of the fluid in said iiuid receiving chamber to automatically move Ithe diaphragm against said wall to shut of! the passage of iluid through the casing, said passage through said diaphragm being near the edge thereof and all ofsaid wall being on one side of said passage.

2. An automatic valve comprising a casing having a substantially continuous passageway extending in a generally continuous forward direction therethrough with an inlet and an outlet,

an obstructing wall extending across said passageway between the inlet and the outlet, said casing having an opening above said wall, a ilexible diaphragm extending across said opening,

which engages said wall to close said passageway, a cover for said opening having a uid re- Y ceiving chamber above said diaphragm, and a dividing said passageway into two sections below said diaphragm, an upstream section and a downstream section, and acting to .increase the pressure in said upstream section and decrease the pressure in said downstream section when the fluid is flowing normally through the casing, and to increase the pressure in the downstream section and decrease the pressure in the upstream section when the fluid starts to iicw through said casing in a 'reverse direction, and

means for automatically utilizing the increased pressure in the downstream section when the fluid starts to ilow in a reverse direction through passage near the edge of said diaphragm and v let, anobstructing wall extending across said passageway between thewinlet' and the outlet, said casing having an opening kabove said wall, a iiexible diaphragm extending across said opening, a cover for said opening -having a uid re ceiving chamber above said diaphragm, said wall the casing to m'ove said diaphragm to its closed position .and shut of! the flow of fluid through the casing, said means comprising an opening through said diaphragm at'the edge thereof, allA of said wall being on one side of said opening.

4. An automatic valve comprising a casing having a substantially continuous passageway ex. tending in a generally continuous forward direction therethrough with an' inlet and an outlet, an obstructing wall extending across said passageway between the inlet and the outlet,said casing having an opening above said wall, a ilexible diaphragm extending across s aid opening, a.

cover for said opening having a uid receiving chamber above said diaphragm, and an 'opening through the edge of said diaphragm leading from a point downstream of said wall to the iluidreceiving chamber, said ldiaphragm opening being on the side of the wall nearest the outlet of the casing, the diaphragm being moved out of en gagement with said wall by the pressure of the fluid, when the uid is ilowing in a forward direction through said passageway, the diaphragm being moved into engagement with said wall to close said passageway when the fluid starts to flow in a reverse direction, due to the increase in pressure in said uid receiving chamber caused by this reverse flow of the uid.

5. An automatic valve comprising a casing having a substantially continuous passagewayv extending in a generally continuous forward direction therethrough with an inlet and an outlet,

an opening intermediate the inlet and outlet, av

iiexible diaphragm extending across said opening, a seat directly engaged by the diaphragm intermediate the inlet and outlet. a fluid receiv- `ing chamber, said diaphragm beingbetween the fluid receiving chamber and the seat and constituting a single separating wall separating said fluid receiving chamberand "said passageway,

and a fluid connection extending through saidv diaphragm at a point at one side of and downstream of the seat and connecting said passageway and said iiuid receiving chamber.

` GEORGE A. 

